diff --git a/.bundle/config b/.bundle/config
new file mode 100644
index 0000000..2369228
--- /dev/null
+++ b/.bundle/config
@@ -0,0 +1,2 @@
+---
+BUNDLE_PATH: "vendor/bundle"
diff --git a/.github/workflows/build-rfc.yml b/.github/workflows/build-rfc.yml
index 0d5c841..03ea7ff 100644
--- a/.github/workflows/build-rfc.yml
+++ b/.github/workflows/build-rfc.yml
@@ -15,23 +15,37 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/cache@v4
         with:
-          path: |
-            $HOME/.local/share/gem
-            .refcache
-          key: webdav-push.mkd
-
-      - name: Install packages
-        run: >
-          sudo apt-get install --no-install-recommends -y golang-go &&
-          sudo gem install kramdown-rfc &&
-          sudo pip3 install svgcheck xml2rfc --break-system-packages &&
-          go install github.com/blampe/goat/cmd/goat@latest && echo ~/go/bin >> $GITHUB_PATH
+          path: .refcache
+          key: kramdown-refcache
+
+      - name: Set up Python
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.x'
+          cache: 'pip'
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+          ruby-version: '4.0'
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v6
+        with:
+          node-version: 'latest'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+          npm ci && echo "$GITHUB_WORKSPACE/node_modules/.bin" >> "$GITHUB_PATH"
 
       - name: Prepare output directory
         run: mkdir build
 
       - name: Kramdown to XML
-        run: kramdown-rfc2629 webdav-push.mkd >build/draft-bitfire-webdav-push-00.xml
+        run: bundle exec kramdown-rfc2629 webdav-push.mkd >build/draft-bitfire-webdav-push-00.xml
 
       - name: XML to HTML
         run: (cd build; xml2rfc --html draft-bitfire-webdav-push-00.xml)
diff --git a/.gitignore b/.gitignore
index 46e8f5c..5a9cb16 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,15 @@
 .idea/
 .obsidian/
 .refcache/
+
 build/
+
+# Node.js
+node_modules/
+
+# Python
+.venv/
+
+# Ruby
+vendor/bundle/
+Gemfile.lock
diff --git a/.local/bin/goat b/.local/bin/goat
new file mode 100755
index 0000000..184c605
Binary files /dev/null and b/.local/bin/goat differ
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..7e40018
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,2 @@
+source "https://rubygems.org"
+gem "kramdown-rfc"
diff --git a/build.sh b/build.sh
index 6a89ae3..c5cefb6 100755
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,9 @@
 #!/bin/sh
+
+export KRAMDOWN_DONT_VERIFY_HTTPS=1
+
 mkdir -p build
-kramdown-rfc2629 -3 webdav-push.mkd >build/webdav-push.xml && (cd build; xml2rfc --html webdav-push.xml && xml2rfc --text webdav-push.xml)
+bundle exec kramdown-rfc2629 -3 webdav-push.mkd >build/webdav-push.xml && (cd build; xml2rfc --html webdav-push.xml && xml2rfc --text webdav-push.xml)
 
 echo To view in a browser, run:   xdg-open build/webdav-push.html
 
diff --git a/content.mkd b/content.mkd
index 7ac3191..828f05b 100644
--- a/content.mkd
+++ b/content.mkd
@@ -23,7 +23,7 @@ Typical use cases:
 
 ## Overview
 
-~~~goat
+~~~aasvg
 .--------------------.   .--------------.   .--------------------.
 | WebDAV-Push Server |   | Push Service |   | WebDAV-Push Client |
 '--------------------'   '--------------'   '--------------------'
@@ -468,7 +468,7 @@ Message encryption ({{message-encryption}}) MUST be used. VAPID(((VAPID))) ({{va
 
 A server that supports the Web Push transport MUST list the `web-push` element(((web-push XML element))) in the `transports` property.
 
-~~~goat
+~~~aasvg
 .--------------------.   .--------------.   .--------------------.
 |                    |   |   Web Push   |   |                    |
 | WebDAV-Push Server |   |   Service    |   | WebDAV-Push Client |
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..b3aabd2
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,24 @@
+{
+  "name": "webdav-push",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "aasvg": "^0.4.3"
+      }
+    },
+    "node_modules/aasvg": {
+      "version": "0.4.3",
+      "resolved": "https://registry.npmjs.org/aasvg/-/aasvg-0.4.3.tgz",
+      "integrity": "sha512-n9I0JklitjU1xVtzQuaHJyUJpI38Q+xbxfeHr//eDHvqCVTOOs3tKN+bqeAfde5owZC/BIrBAg8yKaiB8lkJwA==",
+      "license": "BSD",
+      "bin": {
+        "aasvg": "main.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..ca666cb
--- /dev/null
+++ b/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "aasvg": "^0.4.3"
+  }
+}
diff --git a/prepare.sh b/prepare.sh
new file mode 100755
index 0000000..4b4d3d3
--- /dev/null
+++ b/prepare.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+
+# This script installs all build dependencies locally:
+# - Python dependencies in .venv/
+# - Ruby gems in vendor/bundle/
+# - Node.js dependencies in node_modules/
+# After running this, you can run build.sh
+
+# Python dependencies via venv
+python3 -m venv .venv
+. .venv/bin/activate
+pip install -r requirements.txt
+deactivate
+
+# Ruby dependencies via bundler (local install)
+bundle config set path 'vendor/bundle'
+bundle install
+
+# Node.js dependencies (aasvg)
+npm install
+
+echo "Dependencies installed successfully."
+echo "To use them, prepend to PATH before running build.sh:"
+echo "  PATH=\"$(pwd)/.venv/bin:$(pwd)/vendor/bundle/bin:$(pwd)/node_modules/.bin:\"$PATH ./build.sh"
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..e662659
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+svgcheck
+xml2rfc
diff --git a/webdav-push.mkd b/webdav-push.mkd
index 2555d57..0b87a86 100644
--- a/webdav-push.mkd
+++ b/webdav-push.mkd
@@ -7,8 +7,9 @@ category: exp
 submissionType: independent
 ipr: none
 workgroup: Independent submission
-keyword: WebDAV
-keyword: push
+keyword:
+  - WebDAV
+  - push
 
 stand_alone: yes
 pi: [toc, sortrefs, symrefs]